ASN Wikibase Occurrence # 381121
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| Date: | Sunday 14 August 1983 |
| Time: | 18:42 LT |
| Type: | Aérospatiale SA 360C Dauphin |
| Owner/operator: | Island Helicopters, Inc. |
| Registration: | N8479U |
| MSN: | 1023 |
| Total airframe hrs: | 2777 hours |
| Engine model: | TURBOMECA AST. XVIIIA |
| Fatalities: | Fatalities: 0 / Occupants: 6 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | New York, NY -
 United States of America
|
| Phase: | Approach |
| Nature: | Unknown |
| Departure airport: | Flushing, NY (KLGA) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WHILE ON FINAL APCH TO A HELIPORT, THE HELICOPTER WAS AT APRX 70 KTS & 100 FT AGL WHEN THE PLT APPLIED POWER TO BEGIN DECELERATING. AS COLLECTIVE PITCH WAS APPLIED, HE HEARD A SERIES OF BANGING NOISES WHICH HE DESCRIBED AS SIMILAR TO COMPRESS STALLS. SIMULTANEOUSLY, HE NOTED A DECAY OF THE ENG POWER. THE PLT CHANGED HIS COURSE TO MINIMIZE THE DISTANCE TO THE LANDING AREA & RAISED THE NOSE TO FURTHER DECELERATE FOR A VERTICAL DESCENT. HOWEVER, DURING TOUCHDOWN, THE TAILWHEEL STRUT FAIRING HIT A BARRIER AT THE EDGE OF THE HELIPORT, SEPARATING THE VERTICAL STABILIZER & FENESTRON. THE SEPARATED COMPONENT TRAVELED UPWARD & STRUCK THE MAIN ROTOR BLADES. REPORTEDLY, THE LOW RPM WARNING HORN SOUNDED JUST BEFORE THE COMPRESSOR STALL. CORRECTIVE ACTION FOR A LOW RPM WARNING HORN IN THIS SITUATION SHOULD HAVE BEEN TO REDUCE THE POWER DEMAND BY LOWERING THE COLLECTIVE AND/OR REDUCING RIGHT PEDAL APPLICATION. AN ENG CHECK REVEALED IT WAS CAPABLE OF EXCEEDING THE MAX REQUIRED TORQUE, BUT IT HAD SLIGHT FOULING OF THE FUEL INJECTOR WHEEL & COMPRESSOR AIR FLOW
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB NYC83FA210
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Apr-2024 00:01 | ASN Update Bot | Added |
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